_______age 7, Bruce won second prize in the piano competition.

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问题 _______age 7, Bruce won second prize in the piano competition.

选项 A、In
B、At
C、On
D、For

答案B

解析本题考查介词的选择。at age 7=at the age of 7在七岁的时候，固定搭配。

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小学英语

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